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Joined: Oct 2010
Posts: 221
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Oct 2010
Posts: 221 |
I purchased a compression bleed-down tester, and found that the exhaust valve was leaking, but wait, there's more, the exhaust valve was being compressed by the rocker arm at TDC. I have been setting the valve clearance for each valve when the opposite valve was open. Should I be setting the valve clearance at TDC for each cylinder???
Wow, do I feel dumb!
Dave.
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Joined: May 2002
Posts: 1,213 Likes: 1
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: May 2002
Posts: 1,213 Likes: 1 |
Yes,that's how it's explained in the owners manual.Pull the spark plugs & rocker cover,watch the inlet valve open and close for each cylinder in turn,place a small wooden dowel in each plug hole (separately of course)turn the engine over slowly until you can see the crown of the piston,and watch it as it comes to top dead centre on the compression/firing stroke.Then set the valve clearance for that cylinder.Then do the same for the other 3 cylinders.If you're setting the clearance cold,allow a few extra thou clearance for the valves to expand as the engine heats up. 
CJP'S 29
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Joined: Oct 2010
Posts: 221
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Oct 2010
Posts: 221 |
Odd, the Service Manual does not explain it that way, it simply states to observe the position of the lifter rod, and set at the lowest position. If the lobes are warn or worse, if the timing gears are warn), this may have an outcome on the lowest position. The idea that the gap should be set at TDC makes total sence.
Dave
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